Line: about
Lines
Lines (straight segments) can be created:
- manually (entering extremity points)
 - by propagation from existing lines with the aid of transformation
 - by extrusion from existing points with the aid of transformation
 - within the propagation or extrusion from other entities
 
Line defined by propagation
A line can be created by propagation from an existing line with the aid of a transformation.
            
Line defined by extrusion
A line can be created by extrusion from an existing point with the aid of a transformation. This transformation creates the ending point from the source point.
Whatever transformation is applying the created line is a straight segment connecting the source point to the ending point. We talk about a straight forced extrusion.